Don't take other folks medication

Fella has a terrible headache so he's looking for something to take for it,

He looks in the medicine cabinet and sees a bottle of pills but it has his wife's name on them,
He thinks, what the hell, she's always got a headache, I'll take two.

Two weeks pass and he's got two lumps under his chin, so he goes to his doctor and he explains that he took his wifes pills.

The doc shakes his head and says you've made a big mistake, I've been treating your wife for a prolapse.

The guy says oh dear, but I came to see you about the lumps under my chin, what could they be ?

The doc says, those are your testes my boy.